Bug#919460: Bug#919460: xen: disk I/O problems on stretch PV guest restores after security update

[Sergio Gelato]

No, it did not happen again, at least not to me (and I've since upgraded to 
buster and Xen 4.11), and if no one else has run into it either it's probably 
not worth continued attention. In particular, it's unlikely to have been a 
regression triggered by the +deb9u11 security update.